Improvement in machines for making plumbers  traps



ZSheets-Sheet 2 'J'. ROBERTSON. 4'.NL/LCIIlQE FOR MAKING PLUMBERS TRAPS. 192,192.

Patented J'un'e19,1v877.

UNITED :PATENT rrreya JOHN ROBERTSON, `OF BROOKLYN, NEW YORK.

IMPROllE-MAENFSI` IN MACHINES FOR MAKING PLUMBERS TRAPS.

Specicationformingpart of-lLetters'Iatent No. 192,192, dated J une 19, 1877; application filed i iff i l April-23,1877.

To all whom it may/concern:

Be it known that I, Jor'rNlRonnR'rsoN, of

der water-closets, kitchen-sinks, and the like, the machine operating in connection with a press, by which the lead is forced through an annular outlet, the amount of material Iejected being `regulated by a movable perforated valve, whichserves toadmit more material to that side ofthe annulus atwhich the convex curve of the trap is to be formed than to that side at which the concave portion is to appear.

Means for regulating such discharge oflead directly within the annulus have already previously beendevised; but my invention differs from these in applying the valve, which hasbut one aperture in the line ot' two separate lead-passages that lead to and enter the annulus, and not directly within the annulus,

as heretofore. l

fBy/this means a more perfect and absolute adjustment of thematerijal is obtained, as the separate columns ofv lead inthe two separate channels are nnderseparate control, the leadafter issuingfrom the passages uniting readily within the annulus into the tnbular form required.

My invention consists in a new arrangepassages aforementioned, and forming `also an annular constriction-chamber, in which ,the lead issuing from said twopassages unites into a tube.

It also consists in the combination, with a core-holder havin gsaid two passages, of a perforated valve, whichcan be adjusted to either admit an equal quantity of lead into both passages when al straight tube is required, `or

more into one than into the other, or vice,

versa., when it" isy desired said tube. l

The invention also consists in forming pock-` ets in theouter partofthe casin g,wl1icl1 forms the wall of the` constriction-chamber, which to form a bend in `valve in diiferent positions.

is a detail side view of the core and coreholden Fig. 9, Sheet 2, is a plan view ot' the sliding valve. Fig. 10, Sheet 2, is a detail l.bottom view oftheJ coreand core-holder and of the casing which incloses the same. Fig. ll, Sheet 2, is la vertical central section of a ,modification of the invention. 2, is a. detail plan view of the rocking valve used therein.

ment of core and core-holder, havin g. then,` two 'The invention alsoconsists in hanging all thatpartA of the Vmachine' which contains the lead-chamber, the core, and the constrictionversed to be charged with lead and heated, and in other detailsof invention hereinafter more fully described.v p

In the accompanying sheets ot' drawing,

`Figure 1, Sheet 1, represents Aa plan or top of section. Fig. 4, Sheet 2, is a vertical sec- Jtion of said machine on the linek k, Fig.`1. Fig. 5, Sheet. 2, is a side elevation of the machine. Figs. 6 and 7, Sheet 2, are verticalcentral sections of the mold, showing the Fig. 8, Sheet 2,

Fig. 12, Sheet Similar letters of reference indicatecorrel spondin g parts in all the figures.

A represents the frame ofthe machine. In

it is hung, bytrunnions a a, a metal block or `frame, B, which, at one end, forms a chamber,

b, for the reception of an-,hydraulic rami, D,

:while the other end holds the steel shell O that constitutes the lead-chamber d and the :constriction-ch amber e. `projecting shoulders j', which hold it in place The steel shell Chas against a shoulder, g, formed in the hollow of the block B. The ram D, which is moved 4by water let into the chamber b, entersA also the lead-chamber d, as shown in Figs. 2,3,

and 4, to eject the lead therefrom. E isthe core and core-holder. It is inserted into the `pockets allow the pipe formed bythe machine Y ito bend in themakingof the curves without materially diminishing the strength ot" the said casing.

chamber on trunnions, so that it can be retrap, the line c c, Fig. l, indicating the plane ing it in an upward direction.

e realce shell C from below, and is provided with a conical base or projecting shoulder, which prevents the pressure beneath from displac- This coreholdcr does, at its upper end, terminate in the core proper, Il., which is' a very short projection of inverted truncated conical form, of a less diameter than the body et' the coreholder.

The upper end of the core proper is substantially flush with the upper end of' the shell or chamber G, and between them is formed the constriction-chamber e, which is an annular-chamber, contracted toward its upper end, as clearly shownin Figs. 4, G, and 7. Into this constriction-chamber enter two upright passages, t' and j, which traverse the core-holder E lengthwise on opposite sides of its axis. The lower ends of these passages communicate, through an aperture, l, ot' a movable valve, F, with' the lead-chamber d, as indicated in Figs. 4., (i, and 7, and also in Fig. 1l.

When the chamber d is charged with lead, and the ram I) moved upward, the lead will, through the aperture Z of the valve, andl through the passages i and j, pass into the constriction-chamber c, where it is caused, by

the pressure and by the contracted form of the chamber, to dll said chamber e entirely, and issue therefrom. in form of a tube or pipe.

The valve F is movable, and may be moved, if sliding, by a suitable cam-lever, G, or by other means; or it may be made to rock, as in Fig. 11.

Whenever the valve is so set that its aperture l will leave an equal opening into each of the passages t j, as in Fig. 3, the pipe issuing from the machine will be straight.

In Fig. 3 the trap is represented as complete, with the exception of the last straight end, and it is set to form the same.

When the valve is set to open the passage lmore than-the passage j, as in Fig. 6, more metal will pass through i than throughj, and the pipe issuing will, therefore, curl or bend, as by dotted lines in Fig. 3, the excess of material passing through t' forming the convex part, and the lesser amount of material passing through j forming the concave part ofthe pipe-bend.

If the valve be moved to admit more lead to the passage j than to the passage t', as in Fig. 7, the lead will also curve, but in the reverse direction.

Thus, by merely sliding or rocking the valve, the pipe issuing from the machine can be first made straight, next curved to one side, then to the other, and, finally, again straight, all as required for making an S- shaped trap.

I deem the construction of the core-holder, core, constriction-chamber, and their combination with the perforated valve, to be of' especial value, not only as regards the greater certainty and accuracy in the distribution of the lead, but also as regards the strength and firmness of the core, which, when the distribution is caused to take place directly within an annular chamber, must be of considerable length, and is, consequently, weak and unable to withstand the increase of pressure on either side; consequently the long cores either yield, thereby causing the lead tube to be of unequal thickness, or they break and spoil the entire machine.

rI he steel shell C should also be of considerable strength, and yet it must be thin where the tube is to bend over its edge. I have provided it with pockets m m at its outer part. Into these pocketsthe pipe is properly folded, or fed, as indicated in Fig. 3, and yet the remainder of the shell C is very strong, and not liable to burst, which is frequently the case where shells are made of the vsame thickness throughout, as mine is at the pockets.r

When the frame or block B is swung on its trunnions to bring the mold part G to the bottom, as in Fig. 2, the lead-chamber d can be filled through a suitable aperture, n, and the shell C and core and lead-chamber equally and properly heated by a flame placed underneath. This heating of the parts is necessary for a proper operation of the machine; but in all the machines heretofore made it was impossible to heat them equally, whereas unequal heating is very objectionable. I therefore attach much importa-nce to the use of' the swinging mold.

, The water is supplied to the chamber b by a pipe, o, which passes through one of the trnnnions a., and another pipe, p, which also passes through one of' the trunnions, serves to 'discharge the water from the chamber b. The

said pipes do, therefore, not interfere with the proper manipulation of the machine on its trunnions or pivots.

I claim as my invention- 1. The core-holder E, provided with two passages, t' and j, and with the projecting core proper h, substantially as herein shown and described. s

2. The combination of the core-holder E and core h with the outer shell C, forming the constriction-chamber c, substantially as herein shown and described.

3. The combination of the movable valve F, having the aperture Z, with the core-holderl E, having the separate passages t' and j, and with the lead-chamber d, substantially as herein shown and described.

4. The combination of' the movable per-v substantially as and for the purpose herein trunnions a a,with the chambers b d, ram shown and described. D, and mold O E, all arranged substantially 6. The mold B C E,provided with trunnions as herein shown and described. a a, and pivoted in the frame A, so that it can JOHN ROBERTSON. be reversed, substantially as herein shown Witnesses: "and described. ERNEST C. WEBB, 7. The combination of the block B, having l F. V. BRIESIiNl 

